Liberty Libby German and Abigail Abby Williams (FBI), Richard Allen (Indiana State Police), and the area where the victims’ bodies were discovered (WXIN screenshot)

Attorneys representing Delphi murder suspect Richard Allen over the weekend filed court documents accusing prosecutors of withholding or losing exculpatory evidence — meaning evidence supporting Allen’s innocence — claiming that more than two months of police interviews from 2017 have disappeared without a trace.

The filing, an amended motion to compel discovery and request sanctions against Carroll County prosecutors, was one of several filings from both the defense and prosecutors and the latest twist in what has become one of the most bizarre murder cases in recent memory.

Allen is facing murder charges in connection with the February 2017 slayings of Abigail “Abby” Williams, 13, and Liberty “Libby” German, 14, whose bodies were discovered in a wooded area just off the Delphi Historic Trails system.

Williams and German vanished while walking the Monon High Bridge Trail near Delphi, Indiana, on Feb. 13, 2017. The trail traverses an abandoned stretch of what was once the Monon Railroad and crosses an old trestle over a small river or creek. The girls were found dead the next day in an area near the trestle, and their deaths were determined to be homicides.

According to the amended motion, prosecutors provided Allen’s attorneys with a previously unseen report detailing “how all videos between April 28, 2017 and June 30, 2017” had been lost. Those lost tapes come in addition to two recorded interviews from February 2017 with men that the defense has indicated were “key suspects” in the girls’ murders which authorities said were accidentally erased.

“This is news to the defense as the defense was aware that certain videos did not contain audio, but was unaware that videotaped interviews between April 28, 2017 and June 30, 2017 were missing,” Allen’s attorneys, Brad Rozzi and Andrew Baldwin wrote. “This is most concerning.”